<template>
  <div class="wrapper">
    <!-- header部分 -->
    <header>
      <p>用户登陆</p>
    </header>

    <!-- 表单部分 -->
    <ul class="form-box">
      <li>
        <div class="title">用户名：</div>
        <div class="content">
          <!-- 
				v-model:实现双向绑定
				data和computer中的数据
          -->
          <input type="text" v-model="username" placeholder="用户名" class="username"/>
        </div>
      </li>
      <li>
        <div class="title">密码：</div>
        <div class="content">
          <input type="password" v-model="pass" placeholder="密码" class="pass"/>
        </div>
      </li>
    </ul>

    <div class="button-login">
      <button @click="login">登陆</button>
    </div>
    <div class="button-register">
      <button @click="goToRegister">去注册</button>
    </div>
  </div>
</template>

<script>
import { showToast } from "vant";
export default {
  //data:存放动态数据，vue实例中的model数据
  data() {
    return {
      username: "",
      pass: ""
    };
  },
  methods: {
    //点击登录
    login() {
      //this:当前vue实例
      //发送API请求登录
      this.$http
        .get("/users/login", {
          //get请求的参数是一个对象 请求的参数名要与API接口的参数名保持一致
          params: {
            username: this.username,
            password: this.pass
          }
        })
        .then(res => {
          //res:响应的结果
          console.log(res);
          if (res.data.flag) {
            showToast({
              message: "登陆成功",
              icon: "passed"
            });
            //往sessionStorage中存放当前登录的用户信息,sessionStorage中只能存放json字符串
            sessionStorage.setItem("user", JSON.stringify(res.data.object));
            this.$router.push("/userInfo");
          } else {
            showToast({
              message: res.data.message,
              icon: "close"
            });
            //重置表单
            (this.username = ""), (this.pass = "");
          }
        });
    },
    // 跳转到注册页面
    goToRegister() {
      this.$router.push("/register");
    }
  }
};
</script>

<style scoped>
/****************** 总容器 ******************/
.wrapper {
  width: 100%;
  height: 100%;
}

/****************** header部分 ******************/
.wrapper header {
  width: 100%;
  height: 12vw;
  background-color: #0097ff;
  color: #fff;
  font-size: 4.8vw;

  position: fixed;
  left: 0;
  top: 0;
  z-index: 1000;

  display: flex;
  justify-content: center;
  align-items: center;
}

/****************** 表单部分 ******************/
.wrapper .form-box {
  width: 100%;
  margin-top: 12vw;
}
.wrapper .form-box li {
  box-sizing: border-box;
  padding: 4vw 3vw 0 3vw;
  display: flex;
  align-items: center;
}
.wrapper .form-box li .title {
  flex: 0 0 18vw;
  font-size: 3vw;
  font-weight: 700;
  color: #666;
}
.wrapper .form-box li .content {
  flex: 1;
}
.wrapper .form-box li .content input {
  border: 1px solid #ddd;
  outline: none;
  width: 100%;
  height: 8vw;
  font-size: 3vw;
  border-radius: 5px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.wrapper .form-box li .content input:focus {
  border-color: #0097ff;
  box-shadow: 0 0 8px rgba(0, 151, 255, 0.5);
}
/****************** 登录按钮 ******************/
.wrapper .button-login {
  width: 100%;
  box-sizing: border-box;
  padding: 4vw 3vw 0 3vw;
}
.wrapper .button-login button {
  width: 100%;
  height: 10vw;
  font-size: 3.8vw;
  font-weight: 700;
  color: #fff;
  background-color: #38ca73;
  border-radius: 4px;

  border: none;
  outline: none;
}
/****************** 注册按钮 ******************/
.wrapper .button-register {
  width: 100%;
  box-sizing: border-box;
  padding: 4vw 3vw 0 3vw;
}
.wrapper .button-register button {
  width: 100%;
  height: 10vw;
  font-size: 3.8vw;
  font-weight: 700;
  /*与上面登陆按钮不同的只有颜色、背景色、边框不同*/
  color: #666;
  background-color: #eee;
  border: solid 1px #ddd;
  border-radius: 4px;

  border: none;
  outline: none;
}
/****************** 底部菜单部分 ******************/
.wrapper .footer {
  width: 100%;
  height: 14vw;
  border-top: solid 1px #ddd;
  background-color: #fff;

  position: fixed;
  left: 0;
  bottom: 0;

  display: flex;
  justify-content: space-around;
  align-items: center;
}
.wrapper .footer li {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;

  color: #999;
  user-select: none;
  cursor: pointer;
}
.wrapper .footer li p {
  font-size: 2.8vw;
}
.wrapper .footer li i {
  font-size: 5vw;
}
</style>